Replacement Of Air Conditioner Amplifier Assembly; Removal And Repair Of Refrigeration Pipeline; Disassembly Of Refrigeration System; Main Content Of The Inspection Of Refrigeration System Pipeline - Lifan 620 Maintenance Manual

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VII. Replacement of air conditioner amplifier assembly
1. Disassembly
(1) Disassemble auxiliary dashboard assembly
(2) Disassemble air conditioner amplifier assembly
1) Disconnect the connector
2) Remove air conditioner amplifier assembly
2. Installation
To install, reverse the removal procedure.
VIII. Removal and repair of refrigeration pipeline
1. Common faults for refrigeration pipeline, insufficient refrigeration or no refrigeration caused by
stoppage or leak of refrigeration pipeline.
(1) Weak refrigerant flow or complete blockage caused by pipe bending or deformation.
(2) Leak caused by damage or loose of pipe joint.

2. Disassembly of refrigeration system

Cautions for pipeline disassembly:
(1) When loosening, two wrenches should be applied to avoid damaging pipe fittings. Figure 6-35.
Figure 6-35
(2) For disassembled pipes, pipe joints should be sealed with plugs or cloth to avoid pollution in
the pipes.

3. Main content of the inspection of refrigeration system pipeline:

(1) Check possible loose and leak of pipeline joints, tighten the joint for existing loose; if leak still
exists after tightening with specified torque, it is a must to check the damage of O-ring seal and
pipes.
(2) Check possible sag, bend deformation, rupture of pipeline or damage on pipe joint thread, etc.
If any of the problems aforesaid exists, replace the pipe.
(3) Check whether the pipeline is dirty. If the pipeline is dirty, wash it with pure alcohol. Install it
after complete drying.
Note: Do not clean pipes by applying compressed air.
4. Pipeline installation of refrigerating system
Two wrenches should be applied to install the pipeline of refrigerating system, tightening with
specified tightening torque. Loose tightening can not make pipeline sealed completely. Over tight
tightening will break pipe joint thread easily.
Cautions for installation:
(1) Suitable O-ring seal should be applied. Be cautious of not dropping or damaging the O-ring
seal;
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